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Apple is locking out thieves, cops from stolen/seized iPhones that are lying unused

Apple has thrown a curveball into the tech-security landscape with a subtle yet impactful feature in iOS 18.1, causing quite a stir among law enforcement. The latest update introduces an “inactivity reboot” mechanism that significantly bolsters iPhone security, according to several experts in the field.

This new feature triggers iPhones to automatically reboot if left unlocked for a long time, resetting them to a more secure state. As a result, law enforcement officials trying to break into devices stored for examination have found themselves unexpectedly locked out.

The development was first reported by 404 Media, which revealed that law enforcement agencies were left scratching their heads as iPhones seemingly rebooted on their own. The mystery, however, is gradually unraveling.

Dr. Jiska Classen from the Hasso Plattner Institute confirmed the existence of the “inactivity reboot” function. Screenshots shared by 404 Media showcased snippets of the relevant iOS code, highlighting how the timer operates. Meanwhile, a forensic specialist from Magnet Forensics, Christopher Vance, detailed the timer’s workings in a closed chat group for law enforcement and forensic experts.

According to Vance, the timer kicks in when a device remains in an “AFU” state—short for After First Unlock, meaning the phone has been unlocked at least once but is locked again. The device then reboots to a more secure “BFU” state, or Before First Unlock, which is much more challenging for forensic tools to crack. The kicker? The reboot isn’t triggered by network connectivity or charging; it is just inactivity.

Vance, whose insights were shared anonymously by a source within the closed chat group, emphasized the urgency for officials to act fast. He warned peers to quickly extract data from iPhones in the AFU state to avoid data loss.

After four days of inactivity, a locked iPhone will reboot itself.

This update marks another chapter in the ongoing tug-of-war between tech giants like Apple, who prioritize user privacy, and law enforcement agencies seeking access to data on seized devices.

Initially, police speculated that their issues stemmed from seized phones not being connected to a cellular network or, even wilder, that an iOS 18 device could somehow signal others nearby to reboot. However, experts have since dismissed these theories, pointing to the passage of time as the culprit.

Security experts are defending Apple’s move. They argue that the absolute risk comes from thieves, not law enforcement, and have highlighted how the new feature prevents criminals from keeping a stolen iPhone operational for months while trying to crack it. While rebooting might seem inconvenient, paying for more excellent protection is a small price.

Of course, not everyone is celebrating. Law enforcement officials now face additional hurdles in accessing data and may see things differently. As Vance stressed, the clock is ticking for extracting information, making it crucial for officials to adjust to these new security measures. Apple’s latest update, it seems, is a strong statement in the ongoing debate over privacy versus data access, one that could reshape the future of digital security.

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